ANDROID: android: Add symbols to debug_symbols driver

in our vendor driver, we need the following three kernel variables:
include/linuc/mm.h:
extern unsigned long stack_guard_gap;
extern int sysctl_legacy_va_layout;

include/linux/security.h:
extern unsigned long mmap_min_addr;

Bug: 191439466
Signed-off-by: xieliujie <xieliujie@oppo.com>
Change-Id: I9d1759d8157ddd214475742e417dfb9e870d4b2e

drivers/android/debug_symbols.c

@@ -16,6 +16,8 @@
 #include <linux/memblock.h>
 #include <linux/page_owner.h>
 #include <linux/swap.h>
+#include <linux/mm.h>
+#include <linux/security.h>
 
 struct ads_entry {
 	char *name;
@@ -59,6 +61,13 @@ static const struct ads_entry ads_entries[ADS_END] = {
 #ifdef CONFIG_SWAP
 	ADS_ENTRY(ADS_NR_SWAP_PAGES, &nr_swap_pages),
 #endif
+#ifdef CONFIG_MMU
+	ADS_ENTRY(ADS_MMAP_MIN_ADDR, &mmap_min_addr),
+#endif
+	ADS_ENTRY(ADS_STACK_GUARD_GAP, &stack_guard_gap),
+#ifdef CONFIG_SYSCTL
+	ADS_ENTRY(ADS_SYSCTL_LEGACY_VA_LAYOUT, &sysctl_legacy_va_layout),
+#endif
 };
 
 /*

include/linux/android_debug_symbols.h

@@ -29,6 +29,13 @@ enum android_debug_symbol {
 #endif
 #ifdef CONFIG_SWAP
 	ADS_NR_SWAP_PAGES,
+#endif
+#ifdef CONFIG_MMU
+	ADS_MMAP_MIN_ADDR,
+#endif
+	ADS_STACK_GUARD_GAP,
+#ifdef CONFIG_SYSCTL
+	ADS_SYSCTL_LEGACY_VA_LAYOUT,
 #endif
 	ADS_END
 };